11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "c1/c1_MacroAssembler.hpp"
28 #include "c1/c1_Runtime1.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "gc/shared/collectedHeap.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "oops/arrayOop.hpp"
33 #include "oops/markOop.hpp"
34 #include "runtime/basicLock.hpp"
35 #include "runtime/biasedLocking.hpp"
36 #include "runtime/os.hpp"
37 #include "runtime/sharedRuntime.hpp"
38 #include "runtime/stubRoutines.hpp"
39
40 void C1_MacroAssembler::float_cmp(bool is_float, int unordered_result,
41 FloatRegister f0, FloatRegister f1,
42 Register result)
43 {
44 Label done;
45 if (is_float) {
46 fcmps(f0, f1);
47 } else {
48 fcmpd(f0, f1);
49 }
50 if (unordered_result < 0) {
66 assert(hdr != obj && hdr != disp_hdr && obj != disp_hdr, "registers must be different");
67 Label done;
68 int null_check_offset = -1;
69
70 verify_oop(obj);
71
72 // save object being locked into the BasicObjectLock
73 str(obj, Address(disp_hdr, BasicObjectLock::obj_offset_in_bytes()));
74
75 if (UseBiasedLocking) {
76 assert(scratch != noreg, "should have scratch register at this point");
77 null_check_offset = biased_locking_enter(disp_hdr, obj, hdr, scratch, false, done, &slow_case);
78 } else {
79 null_check_offset = offset();
80 }
81
82 // Load object header
83 ldr(hdr, Address(obj, hdr_offset));
84 // and mark it as unlocked
85 orr(hdr, hdr, markOopDesc::unlocked_value);
86 // save unlocked object header into the displaced header location on the stack
87 str(hdr, Address(disp_hdr, 0));
88 // test if object header is still the same (i.e. unlocked), and if so, store the
89 // displaced header address in the object header - if it is not the same, get the
90 // object header instead
91 lea(rscratch2, Address(obj, hdr_offset));
92 cmpxchgptr(hdr, disp_hdr, rscratch2, rscratch1, done, /*fallthough*/NULL);
93 // if the object header was the same, we're done
94 // if the object header was not the same, it is now in the hdr register
95 // => test if it is a stack pointer into the same stack (recursive locking), i.e.:
96 //
97 // 1) (hdr & aligned_mask) == 0
98 // 2) sp <= hdr
99 // 3) hdr <= sp + page_size
100 //
101 // these 3 tests can be done by evaluating the following expression:
102 //
103 // (hdr - sp) & (aligned_mask - page_size)
104 //
105 // assuming both the stack pointer and page_size have their least
313
314 if (CURRENT_ENV->dtrace_alloc_probes()) {
315 assert(obj == r0, "must be");
316 far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)));
317 }
318
319 verify_oop(obj);
320 }
321
322
323 void C1_MacroAssembler::inline_cache_check(Register receiver, Register iCache) {
324 verify_oop(receiver);
325 // explicit NULL check not needed since load from [klass_offset] causes a trap
326 // check against inline cache
327 assert(!MacroAssembler::needs_explicit_null_check(oopDesc::klass_offset_in_bytes()), "must add explicit null check");
328
329 cmp_klass(receiver, iCache, rscratch1);
330 }
331
332
333 void C1_MacroAssembler::build_frame(int framesize, int bang_size_in_bytes) {
334 // If we have to make this method not-entrant we'll overwrite its
335 // first instruction with a jump. For this action to be legal we
336 // must ensure that this first instruction is a B, BL, NOP, BKPT,
337 // SVC, HVC, or SMC. Make it a NOP.
338 nop();
339 assert(bang_size_in_bytes >= framesize, "stack bang size incorrect");
340 // Make sure there is enough stack space for this method's activation.
341 // Note that we do this before doing an enter().
342 generate_stack_overflow_check(bang_size_in_bytes);
343 MacroAssembler::build_frame(framesize + 2 * wordSize);
344 if (NotifySimulator) {
345 notify(Assembler::method_entry);
346 }
347 }
348
349 void C1_MacroAssembler::remove_frame(int framesize) {
350 MacroAssembler::remove_frame(framesize + 2 * wordSize);
351 if (NotifySimulator) {
352 notify(Assembler::method_reentry);
353 }
354 }
355
356
357 void C1_MacroAssembler::verified_entry() {
358 }
359
360 void C1_MacroAssembler::load_parameter(int offset_in_words, Register reg) {
361 // rbp, + 0: link
362 // + 1: return address
363 // + 2: argument with offset 0
364 // + 3: argument with offset 1
365 // + 4: ...
366
367 ldr(reg, Address(rfp, (offset_in_words + 2) * BytesPerWord));
368 }
369
370 #ifndef PRODUCT
371
372 void C1_MacroAssembler::verify_stack_oop(int stack_offset) {
373 if (!VerifyOops) return;
374 verify_oop_addr(Address(sp, stack_offset), "oop");
375 }
376
377 void C1_MacroAssembler::verify_not_null_oop(Register r) {
378 if (!VerifyOops) return;
|
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "c1/c1_MacroAssembler.hpp"
28 #include "c1/c1_Runtime1.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "gc/shared/collectedHeap.hpp"
31 #include "gc/shared/barrierSet.hpp"
32 #include "gc/shared/barrierSetAssembler.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "oops/arrayOop.hpp"
35 #include "oops/markOop.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/biasedLocking.hpp"
38 #include "runtime/os.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/stubRoutines.hpp"
41
42 void C1_MacroAssembler::float_cmp(bool is_float, int unordered_result,
43 FloatRegister f0, FloatRegister f1,
44 Register result)
45 {
46 Label done;
47 if (is_float) {
48 fcmps(f0, f1);
49 } else {
50 fcmpd(f0, f1);
51 }
52 if (unordered_result < 0) {
68 assert(hdr != obj && hdr != disp_hdr && obj != disp_hdr, "registers must be different");
69 Label done;
70 int null_check_offset = -1;
71
72 verify_oop(obj);
73
74 // save object being locked into the BasicObjectLock
75 str(obj, Address(disp_hdr, BasicObjectLock::obj_offset_in_bytes()));
76
77 if (UseBiasedLocking) {
78 assert(scratch != noreg, "should have scratch register at this point");
79 null_check_offset = biased_locking_enter(disp_hdr, obj, hdr, scratch, false, done, &slow_case);
80 } else {
81 null_check_offset = offset();
82 }
83
84 // Load object header
85 ldr(hdr, Address(obj, hdr_offset));
86 // and mark it as unlocked
87 orr(hdr, hdr, markOopDesc::unlocked_value);
88
89 if (EnableValhalla && !UseBiasedLocking) {
90 // Mask always_locked bit such that we go to the slow path if object is a value type
91 andr(hdr, hdr, ~markOopDesc::biased_lock_bit_in_place);
92 }
93
94 // save unlocked object header into the displaced header location on the stack
95 str(hdr, Address(disp_hdr, 0));
96 // test if object header is still the same (i.e. unlocked), and if so, store the
97 // displaced header address in the object header - if it is not the same, get the
98 // object header instead
99 lea(rscratch2, Address(obj, hdr_offset));
100 cmpxchgptr(hdr, disp_hdr, rscratch2, rscratch1, done, /*fallthough*/NULL);
101 // if the object header was the same, we're done
102 // if the object header was not the same, it is now in the hdr register
103 // => test if it is a stack pointer into the same stack (recursive locking), i.e.:
104 //
105 // 1) (hdr & aligned_mask) == 0
106 // 2) sp <= hdr
107 // 3) hdr <= sp + page_size
108 //
109 // these 3 tests can be done by evaluating the following expression:
110 //
111 // (hdr - sp) & (aligned_mask - page_size)
112 //
113 // assuming both the stack pointer and page_size have their least
321
322 if (CURRENT_ENV->dtrace_alloc_probes()) {
323 assert(obj == r0, "must be");
324 far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)));
325 }
326
327 verify_oop(obj);
328 }
329
330
331 void C1_MacroAssembler::inline_cache_check(Register receiver, Register iCache) {
332 verify_oop(receiver);
333 // explicit NULL check not needed since load from [klass_offset] causes a trap
334 // check against inline cache
335 assert(!MacroAssembler::needs_explicit_null_check(oopDesc::klass_offset_in_bytes()), "must add explicit null check");
336
337 cmp_klass(receiver, iCache, rscratch1);
338 }
339
340
341 void C1_MacroAssembler::build_frame(int framesize, int bang_size_in_bytes, bool needs_stack_repair, Label* verified_value_entry_label) {
342
343
344 // If we have to make this method not-entrant we'll overwrite its
345 // first instruction with a jump. For this action to be legal we
346 // must ensure that this first instruction is a B, BL, NOP, BKPT,
347 // SVC, HVC, or SMC. Make it a NOP.
348 nop();
349 assert(bang_size_in_bytes >= framesize, "stack bang size incorrect");
350 // Make sure there is enough stack space for this method's activation.
351 // Note that we do this before doing an enter().
352 generate_stack_overflow_check(bang_size_in_bytes);
353
354 guarantee(needs_stack_repair == false, "Stack repair should not be true");
355 if (verified_value_entry_label != NULL) {
356 bind(*verified_value_entry_label);
357 }
358
359 MacroAssembler::build_frame(framesize + 2 * wordSize);
360 if (NotifySimulator) {
361 notify(Assembler::method_entry);
362 }
363 }
364
365 void C1_MacroAssembler::remove_frame(int framesize, bool needs_stack_repair) {
366
367 guarantee(needs_stack_repair == false, "Stack repair should not be true");
368
369 MacroAssembler::remove_frame(framesize + 2 * wordSize);
370 if (NotifySimulator) {
371 notify(Assembler::method_reentry);
372 }
373 }
374
375 void C1_MacroAssembler::verified_value_entry() {
376 if (C1Breakpoint || VerifyFPU || !UseStackBanging) {
377 // Verified Entry first instruction should be 5 bytes long for correct
378 // patching by patch_verified_entry().
379 //
380 // C1Breakpoint and VerifyFPU have one byte first instruction.
381 // Also first instruction will be one byte "push(rbp)" if stack banging
382 // code is not generated (see build_frame() above).
383 // For all these cases generate long instruction first.
384 nop();
385 }
386
387 // build frame
388 // DMS CHECK: is it nop?
389 // verify_FPU(0, "method_entry");
390
391 }
392
393 int C1_MacroAssembler::scalarized_entry(const CompiledEntrySignature *ces, int frame_size_in_bytes, int bang_size_in_bytes, Label& verified_value_entry_label, bool is_value_ro_entry) {
394 guarantee(false, "Support for ValueTypePassFieldsAsArgs and ValueTypeReturnedAsFields is not implemented");
395 return 0;
396 }
397
398
399 void C1_MacroAssembler::load_parameter(int offset_in_words, Register reg) {
400 // rbp, + 0: link
401 // + 1: return address
402 // + 2: argument with offset 0
403 // + 3: argument with offset 1
404 // + 4: ...
405
406 ldr(reg, Address(rfp, (offset_in_words + 2) * BytesPerWord));
407 }
408
409 #ifndef PRODUCT
410
411 void C1_MacroAssembler::verify_stack_oop(int stack_offset) {
412 if (!VerifyOops) return;
413 verify_oop_addr(Address(sp, stack_offset), "oop");
414 }
415
416 void C1_MacroAssembler::verify_not_null_oop(Register r) {
417 if (!VerifyOops) return;
|